Wonn Soh
Soh
Wonn
Timothy Byrne
Byrne
Timothy
Asahiko Taira
Taira
Asahiko
Atsushi Kono
Kono
Atsushi
(Table 2) CT scan measurements of ODP Site 131-808
PANGAEA
Data Publisher for Earth & Environmental Science
dataset
X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the frontal thrust and décollement to homogeneous and essentially undeformed sediments above the frontal thrust and beneath the décollement. In the CT images, kink-like deformation bands and faults are recognized as obvious bright seams, bands, or stripes with relatively high linear attenuation coefficients. The differences in linear attenuation coefficients relative to the matrix range from 0.021 cm**2/g (kink-like deformation band) to 0.038 cm**2/g (fault). These data suggest a 0.10 g/cm**3 to 0.18 g/cm**3 increase in bulk density within the deformation structures, and they appear to be 13% and 33% more compacted than the nondeformed matrix, respectively. In contrast to the samples from the frontal thrust zone, CT images of the décollement sample exhibit relatively homogeneous textures. The attenuation coefficient of the sample of the décollement indicates bulk density and porosity values of 2.45 g/cm**3 and 18%, respectively. The sample, hence, is approximately 50% more compacted than the sediment outside the décollement zone.
Ian Ashley Hill
Hill
Ian Ashley
John V Firth
Firth
John V
Ulrich Berner
Berner
Ulrich
Warner Brückmann
Brückmann
Warner
T Chabernau
Chabernau
Andrew T Fisher
Fisher
Andrew T
Jean Paul Foucher
Foucher
Jean Paul
Toshitaka Gamo
Gamo
Toshitaka
Joris M Gieskes
Gieskes
Joris M
Roy D Hyndman
Hyndman
Roy D
Daniel E Karig
Karig
Daniel E
Miriam Kastner
Kastner
Miriam
Yukihiro Kato
Kato
Yukihiro
Siegfried J Lallemant
Lallemant
Siegfried J
Ran Lu
Ran
Alex J Maltman
Maltman
Alex J
Gerald F Moore
Moore
Gerald F
K Moran
Moran
Gunnar Olafsson
Olafsson
Gunnar
W Brechner Owens
Owens
W Brechner
Kevin T Pickering
Pickering
Kevin T
Franca Siena
Siena
Franca
Elliott Taylor
Taylor
Elliott
Michael B Underwood
Underwood
Michael B
Clive Wilkinson
Wilkinson
Clive
Makoto Yamano
Yamano
Makoto
J Zhang
Zhang
Sediment deformation and hydrogeology of the Nankai Trough accretionary prism: Synthesis of shipboard results of ODP Leg
Earth and Planetary Science Letters
journal article
data points
Sample code/label
DSDP/ODP/IODP sample designation
DEPTH, sediment/rock
depth
sediment
rock
Length
Attenuation value
cm**2/g
X-ray computed tomography (CT)
Attenuation value, standard deviation
standard deviation
std dev
Sample comment
Density, wet bulk
g/cm**3
from Taira et al. (1992)
Density
Porosity
% vol
porosity
unrestricted
text/tab-separated-values
text/html
Computed tomography (CT) scan image analysis of Site 808 cores: structural and physical property implications
Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program)
book chapter